Washing machines are used to extract (dewater) solid materials from
liquids when they are mixed together in slurry.

A main drive motor supplies power to turn the centrifuge. AC drives
are commonly used to power the main drive motor. There are several
different types of washing machines, such as: Vertical, horizontal,
or scroll (conveyor).

Application Challenges

Minimize the need for gears or belts to drive the centrifuge.

Control and maintain speed during the decanting process

Develop high torque at very low speeds.

Two motor applications, one for the bowl and one for the scroll.

The bowl has a very high-reflected inertia.

The scroll is usually in continuous regeneration, as it runs at a
slower speed than the bowl and is pulled along.

Torque limiting on the scroll is very important.

Some configurations require zero-speed operation of the scroll
(differential gearbox).

Dynamic braking or regenerative modules may be required if the bowl
is NOT driven by a drive.

Power range of V8 VFD

Voltage: 3 phase 380VAC (304VAC – 460VAC)

Power: 0.4kw/0.5HP – 400kw/535HP

Specification of V8 VFD

Item

Specification

Input frequency

50/60Hz

Output frequency

0-600Hz

Overload current

150% rated current 1min., 180% 2 sec.

Control mode

sensor-less vector control(SVC), V/F control

Starting torque

150% 1Hz (SVC 150% 0.5Hz)

Control precision

±0.5%

Given Frequency Resolution

Digital given: 0.01Hz, analog given: 0.05Hz

Running Mode

Keyboard, control terminal, RS485

Output Voltage self-adjustment

When AVR function is enabled, the input voltage changes, while the
output voltage almost remains unchanged

A variable-frequency drive (VFD) is a system for controlling the
rotational speed of an alternating current (AC) electric motor by
controlling the frequency of the electrical power supplied to the
motor. A variable frequency drive is a specific type of
adjustable-speed drive. Variable-frequency drives are also known as
adjustable-frequency drives (AFD), variable-speed drives (VSD), AC
drives, microdrives or inverter drives. Since the voltage is varied
along with frequency, these are sometimes also called VVVF
(variable voltage variable frequency) drives.